Trolley.



Application led February 15, 1915.

To all whom, t may concern.'

Be it known that I, HARRY K. MCCLURE, a citizen ot the United States, residing at Elk Lick, in the county of Somerset and State of Pennsylvania, have invented certain new and useful Improvements in Trolleys, of which the following is a specification.

,My invention consists of an improvement in trolleys for street car and other service, in providing a rolling conductor between the trolley wire and the motor.

It has for its object to provide a construetion in which the wearing or contacting porn tion of the wheel is so constructed and mounted, in connection with and relation to the main revoluble wheel member, as to provide for easy removal and renewal, thus cHecting a very considerable saving in the wheel, and avoiding the usual necessity of replacing a worn wheel with an entirely new one.

Preferred constructions embodying the invention are illustrated in the accompanying drawings, in which- Figure 1 is a vertical sectional view through a trolley wheel showing one form of the invention.

SFig. 2 is a partial side elevation of Fig. 1.

In the drawings, the entire revoluble wheel structure is mounted to revolve around a supporting central spindle, which,

by its outer ends, is carried in the usual terminals of a supporting harp 2, indicated in dotted lines. The spindle, which is of the usual construction, is secured in the harp by means of the usual nut or nuts, and is provided, between the harp terminals, with an embracing bushing 8 of suitable material, as bronze, copper, etc., adapted to provide a surrounding bearing for the revoluble hub member or members of the wheel.

These hub members, as shown in Fig. 1 comprise the main hub 4, the central transverse cylindrical opening through which engages around the bushing 3 for easy rotation thereon.

Hub 4 extends (zo-extensive with said )ushing from one end to the other, between he harp terminals 2, and is provided at Vne end with a locking or abutment nut 5. Lt one side of the transverse center, hub 4 xtends lat rally, providing a supporting ad resisting edge portion (S, the inner side E which is recessed annularly, providing a iouldered middle bearing portion 7 and Specification of Letters Patent.

UNTED STATES PATENT OFFCEa TROLLEY.

Patented Nov. 13, 1917.

Serial No. 8,168.

an inner flat face on the inner side of extension 6, adapted to receive the renewable Contact ring 8.

Said ring, as shown, is provided centrallyof'its periphery with the trolley wireengaging groove 9, the edges ot' which flare outwardly, so as to provide for easyfengagement with the Wire, somewhat in the manner of the usual one-piece trolley wheel.

Between the main hub 4 and the locking nut 5 is the co-acting supplemental hub member 10,; the inner and outer faces oi' which correspond to the opposite hub extension 6, and provides at its inner face a Haft surface adapted to engage against the confronting face of the wheel 8, and also a` supporting annular face 11 for the inner portion of the wheel, as will be readily understood. Wheel 8, as shown, is rectangular in cross section, as to its main body portion and inner periphery, providing a co-acting inner annular diametrical surface and the outer parallel side faces 12.

The tapering edge portions of the wheel 8 extend preferably somewhat beyond the lateral hub extensions 6 and 10, and the wheel itself is of suflicient depth from the outer bottom of the groove to the inner circular face to provide an ample body portion for the bearing strain of the wire, and for deterioration or reducing wear in action.

The inner supporting edge portions of the main and supplemental hub members are spaced apart, when said members are in operative position, as shown, sufficiently far to provide an intervening annular cavity 13, which, at any point annularly of the main hub 4, is enlarged, so as to provide a lubricant cavity 14.

A supply port 15 having a suitable closure 16 provides for filling of the cavity and annular space with a suitable lubricant, and by ports 17 and 18, through the hub 4 and bushing, lubricant is supplied to the' wearing surfaces, i. e., both outside and inside of the bushing, should the bushing itself revolve with the hub.

By this construction it will be seen that the main body portion of the wheel comprising the holding hubs, as thus mounted, receive no wear Whatever, and are practically indestructible. The wheel 8, being com aratively small and light, is capable of seing easily mounted in the hub structure and of beinv removed by replacement by a new wheel when Worn.

may be variously changed or 1nodiied=bythe skilled. mechanic in different features or details but that all such are to be considered as within the scope of the following claim.

What I claim is:

= In combination with the harp, spindle and bushing; of a hub rotatably mounted on said bushing having. av central barrel; an anterminal at the other side oi recess, s'aid fri'eeessbein nnlar retaining flange at one side of said hub, an annular inwardly extending bearing portion integral'with'saidflange, a threaded said hub, a supplemental hub'member telescoping said barrel, said .supplemental bearing having an annular retaining flange and an annular inwardly extendingbearing portion, said last named bearing portion being spaced from said first named bearing portion, formino' a ien-largedat a point annu-l'arly offsaidhub orming a lubricating cavity; atrolleywheel on said bearing por tion arida=locking member. screw-threaded on fsaid threaded rterminaladapted to clamp saiclwheelt in place.

In testimony whereof I hereunto aiix my signaturein'the presence of two witnesses.

. :HARRY K. M'CCLURE. I'Vitnesses:

A. E. LIvENGooD, ALBERT Reim.

Copies -of this patent may be obtained for five cents ea'eh, by-addressing the Commissioner 4of Patents, Washington; D. C. 

